C / C++ / MFC

cy163@hotmail.com wrote:

Would you please be more detialed on how to use fstream class to implement my purpose.

// Another simple example - Your class should probably have a constructor! :)
 
#include <string>
#include <iostream>
using namespace std;
... 
class S
{
   string Str;
   int Value;
public:
   friend ostream& operator<< (ostream& os, S& s);
   friend istream& operator>> (istream& is, S& s);
};
 
ostream& operator<< (ostream& os, S& s)
{
   os << s.Str;
   os.put('\n');
   os.write((char *)&s.Value, sizeof(int));
   return os;
}
 
istream& operator>> (istream& is, S& s)
{
   is >> s.Str;
   is.get();
   is.read((char *)&s.Value, sizeof(int));
   return is;
}
 
...
// Write an S object 
   S s;
   ofstream myfile("c:\\testmyfile.ext" , ios::binary : ios::trunc);
   myfile << s;
...
// Read an S object 
   S s;
   ifstream myfile("c:\\testmyfile.ext" , ios::binary);
   myfile >> s;

cy163@hotmail.com wrote:

Yes, i actually had problem with string item in the struct. Actually, I used char Name[20]. However,
the length of the contents is varying. 20 is the max. length of the Name attribute of objects.
Hence, memory was wasted by objects with a Name less than 20 characters. How to solve this
problem.

cy163@hotmail.com wrote:

Actually, I need a function in pure C++ framework to write/read the struct as a whole

TragicComic wrote:

would like to be able to overlay a timer (hours:minutes) on top of my system tray icon, but due to the default size (16x16), there simply isn't enough room to display the timer in a visually appealing manner.

GetVersion()<br />
GetVersionEx()<br />
VerifyVersionInfo()

RomTibi wrote:

I'll try monday

shaderx wrote:

should i put static in front of my method declaration ?